2018 AON Open Challenger

Country	Player	Rank1	Seed
FRA	Benoît Paire	56	1
SVK	Martin Kližan	71	2
ITA	Paolo Lorenzi	94	3
POL	Hubert Hurkacz	109	4
ARG	Federico Delbonis	111	5
ARG	Guido Andreozzi	113	6
BRA	Thiago Monteiro	118	7
ITA	Lorenzo Sonego	121	8

• ¹ Rankings are as of 27 August 2018.^[1]

The following players received wildcards into the singles main draw:

• Filippo Baldi
• Andrea Basso
• Dustin Brown
• Giovanni Fonio

The following player received entry into the singles main draw as an alternate:

• Lukáš Rosol

The following players received entry from the qualifying draw:

• Alen Avidzba
• Sumit Nagal
• Andrea Pellegrino
• Zsombor Piros

The following players received entry as lucky losers:

• Thomaz Bellucci
• Juan Pablo Varillas

• Lorenzo Sonego def. Dustin Brown 6–2, 6–1.

• Kevin Krawietz / Andreas Mies def. Martin Kližan / Filip Polášek 6–2, 3–6, [10–2].